<template>
  <footer class="footer">
    <span class="todo-count">剩余<strong>{{ list.length }}</strong></span>
    <ul @click="changeTask" class="filters">
      <li>
        <a 
        @click="isAll = 'all'"
        :class="{ selected: isAll === 'all' }" 
        href="javascript:;" >全部</a>
      </li>
      <li>
        <a 
        @click="isAll = 'no'"
        :class="{ selected: isAll === 'no' }"
        href="javascript:;">未完成</a>
      </li>
      <li>
        <a 
        @click="isAll = 'yes'"
        :class="{ selected: isAll === 'yes' }"
        href="javascript:;" >已完成</a>
      </li>
    </ul>
    <button @click="clearTask" class="clear-completed" >清除已完成</button>
  </footer>
</template>

<script>
export default {
    props: ['list'],
    data() {
        return {
            isAll: 'all'
        }
    },
    methods: {
        changeTask() {
            this.$emit('changeTask',this.isAll)
        },
        clearTask() {
            this.$emit('clearTask')
        }
    }
}
</script>